Discharging device for kiln furnaces



R. VON STEIGER.

DISCHARGING DEVICE FOR KILN FU RNACES. APPLICATION FILED AUG.22, I919.

1,41 2,8 1 1 Patented Apr. 11, 1922.

"iii nun in discharglng ueursn stare ROBERT VON STEIGER, 0F. ROSENBERG,SWITZERL ALND, ASSTGNOR TO THE FIRM 01 GEBBUDER BlI HLER, OF UZWIL,SXVI'IZERLANID.

DISCHARGING DEVICE FOR Krnn rnanacns.

i,di2,811.

Application filed August 22,

To (LU/1072,0777; it may concern:

Be it known that 1, ROBERT VON S'rnrenn, a citizen of the Republic ofSwitzerland, residing at Rosenberg, Niederuzwil, Switzerland, haveinvented certain new and useful Improvements in Discharging Devices forKiln Furnaces; and I do hereby declare the following to be a clear,.full, and exact description of the invention, such. as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawing, and to letters orfigures o reference marked thereon, which form a part of thisspecification.

This. invention relates to improvements devices for kiln-furnaces forburning sintering material, such as cement, magnesite and the like.

The object of this invention is to provide a discharging device of thekind referred to comprising one or several breaking beams adapted to bemoved intheir longitudinal direction on a stationary furnace-bed by adriving mechanism, so that the burnt material is loosened, broken up anddischarged by said beams.

This invention will now be more particularly described with reference tothe accompanying drawing illustrating by way of example two modes ofcarrying out the invention. In this drawing:

Fig. 1 is a vertical section on the line I-I of Fig. 3 through thelower. portion of the kiln-furnace,

Fig. 2 is a vertical section on the line IL-II of Fig. 3 and Fig. 3 is aplan view of this furnace.

Fig. i is a vertical section correspond-- ing to Fig. 2 through amodified construction of the furnace-bed.

Fig. 5 is a perspective view of portions of two breaking beams, an

Fig. 6 is a vertical cross-section through a modification of a detail.

Referring to the drawing, 1 designates the kiln, 2 the lining, 3 anintermediate shaft wall, 4: the external wall of the kilnfurnace, 5 thefurnace-bed and 6 the breaking beams. Each of the latter is connects at7 to a crank mechanism 8 adapted to impart to the corresponding breakingbeam 6 a to and fro movement in its longitudinal direction. Theembodiment shown comprises two such beams 65 when required,

Specification of Letters Patent.

Patented Apr. 1111, 11%2Z.

1919. Serial No. 313,127.

also only one or more than two such beams may be provided. Preferably,the two breaking beams 6 are moved simultaneously in the samedirection", by providing crank arms 8 at 180 they can be moved, however,also in opposite directions. The different beams 6 can have the same ordifferent strokes. and the stroke of each beam may be varied byadjusting for instance the point at which the crank pin is fixed to thecrank arm 8 within the slot 9. The beams 6 have preferably pentagon-likecross-section, one of the corners extending upwards. Thelse beams 6 areprovided with breaking teet i.

The operation of a device as hereinbefore described is for instance asfollows:

When a to and fro movement is imparted to the two beams 6, the lowermostportion of the column of material contained in the kiln and consistingmostly of large pieces or frequently also of a single block con stitutedof material that has sintered together, ners of said beams 6, millingoff the material. breaking it up and loosening it, whereby the teeth ofthese beams 6 press art of the material against the lower edges of thekiln. Thus, the materal in the kiln is reduced into small pieces and thebroken pieces are discharged at the front and rear end of the furnace.

For the purpose of increasing the discharging action. it is foundsometimes advisable to provide scooping bars 10 (Fig. 5) arrangedtransversely of the beams 6 and adapted to push the broken up materialforwards and to sweep the whole width of the crosssection of the kiln.The scooping bars 10 can be designed either as smooth beams as shown inFig. 5, or they be provided on their outer surface with teeth orprojections 11 (see Fig. 6) in order to fur ther break up the materialagainst which they are forced. As illustrated. the scooping bars 10 arepreferably secured to the breaking beams 6 so that they are movedtogether with the latter which preferably have all the same stroke andare all moved in the same direction.

As shown, the upper surface of the furnace-bed 5 is preferablyhorizontal over its whole length. Should it be designed slightlyinclined towards the discharge-ends, the slope of this inclined surfacemust be so is acted upon by the teeth and corsmall that the materialresting thereon is prevented from starting of itself to slide down saidsurface. The upper surface of the furnace-bed 5 projects at'bothdischarge sides of the kiln at least to an amount beyond thecross-section of the kiln determined by the angle of repose of thematerial. Thus, any irregular rial, which would detrimentally influencethe regular working of the furnace, is pre- In the embodiment of theinvention illustrated in Figs. 1 to 3, the bottom of the kiln isdesigned as a massive body; but as shown in Fig. 4, it can be designedalso as a grate in order to allow an admission of combustion air frombeneath. In such a case it is advisable to make the apertures betweenthe single grate bars not larger than 10-15 cm., in order to prevent toogreat a discharge of fine material through said apertures.

What I claim now as my invention is:

1. In a sintering furnace, a discharge de: vice comprising at least onelongitudinally reciprocable breaking bar reciprocable on the chargesupporting surface.

2. In a sintering furnace, a discharge device comprising at least onebar'longitudinally reciprocable on the charge supporting surface, saidbar being substantially wedge shaped in section and breaker teeth on thesurface of said bar.

3. In a sintering furnace, a discharge device, a longitudinallyreciprocable breaker bar having laterally projecting scooping bars.

4. In a 'sintering furnace, a discharge de- V108, a longitudinallyreciprocable breaker discharge of fine mate-l bar having laterallyprojecting scooping bars and breaker teeth on the latter bars.

5. A discharge device for sintering furcharge support onwhich saidbar'sreciprO- cate.

77 In a sintering furnace a shaft, a'charge supporting, surface spacedbelow saidshaft and whose extent beyond the inner walls of the shaft isdependent upon, the angle of repose of the material being sintered, atleast one longitudinally reciprocable bar on said surface beneath thecharge, andv breaker teeth on said bar. I a

8. In a sintering furnace, supporting means for the charge, at least onebreaking bar reciprocable on said means ing to discharge material atboth ends of said bar. a i a 9, In a sintering furnace, supporting meansfor the charge spaced from the bottom of the furnace shaft, a breakingbar'and means to reciprocate said bar on the charge support to dischargethe furnace product at opposite ends of said supporting means and Intestimony that I claim as my invention, 'I

ROBE

the foregoing RT VO STEIGER;

and spenthave signed my name; 1

